type Worker struct {
	cfg WorkerConfig

	masterConn *grpc.ClientConn
	masterCli  proto.JobQueueClient
}

// NewWorker creates a new Worker instance with the specified configuration.
func NewWorker(cfg WorkerConfig) (*Worker, error) {
	if err := cfg.Validate(); err != nil {
		return nil, xerrors.Errorf("worker config validation failed: %w", err)
	}

	return &Worker{cfg: cfg}, nil
}

// Dial establishes a connection to the master node.
func (w *Worker) Dial(masterEndpoint string, dialTimeout time.Duration) error {
	var dialCtx context.Context
	if dialTimeout != 0 {
		var cancelFn func()
		dialCtx, cancelFn = context.WithTimeout(context.Background(), dialTimeout)
		defer cancelFn()
	}

	conn, err := grpc.DialContext(dialCtx, masterEndpoint, grpc.WithInsecure(), grpc.WithBlock())
	if err != nil {
		return xerrors.Errorf("unable to dial master: %w", err)
	}

	w.masterConn = conn
	w.masterCli = proto.NewJobQueueClient(conn)
	return nil
}